Ohhhh wow. Flawl3ss just got me onto the beta list and I have to say it's fucking brilliant. The realism freaks (such as myself) will be disappointed at first - there's things like "get three kills and you can use the UAV" - but it's so much fun you wouldn't believe it. Teamwork helps (was nice to see a few guys actually following me, while I'm shouting "BEHIND THE SANDBAGS"), but isn't absolutely neccessary if you're a renegade. The air strikes are brilliant, a helicopter bears down on you and you've got to find a safe place - not neccessarily a building as the roofs are missing in patches, due to there being a war and everything. When the helicopters (or planes) go over, the floor rumbles, the screen rocks and you know you have to run for it. Usually I'm not a big shooter fan but this is brilliant.
The only thing that dampened the experience was a match where someone said "I'm not a racist, I just hate black people", and the flaming that ensued. But there's not a lot the CoD team can do about the human race, unfortunately.